SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
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IF 2.931
Sai Kumar Tammina,Dezhi Yang,Xiao Li,Sivasankar Koppala,Yaling Yang
High photoluminescent quantum yield carbon nanomaterials doped with heteroatoms are of profound attention in various fields like bio-imaging, chemical sensors and electronics. Among all heteroatoms, zinc is one of the low toxic significant elements and also involves in various electron-transfer processes. These properties are added advantages to utilize zinc as a dopant in CDs synthesis. In this investigation, our group reports a one-step microwave digestion method to synthesize nitrogen and Zinc doped carbon dots (N, Zn-CDs). The optical properties of N, Zn-CDs were investigated using UV–Vis and fluorescence spectrophotometry and also the N, Zn-CDs structural features were studied with other characterization tools like XPS, TEM , EDX, FTIR and XRD. N, Zn-CDs inherent the appreciable photoluminescent quantum yields about 63.28%. And the synthesized N, Zn-CDs utilized for detection of Fe 3+ and temperature. The observed results are promising and exhibited the detection limit of 0.027 μM. Also, the proposed sensing system was successfully adopted for the detection of Fe 3+ in the river and circulating water samples for the practical applications and satisfactory results are observed. The current synthesis methodology and sensing potential might open up a new prospect to develop potential applications in environmental monitoring.
研究领域:
材料科学
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化学传感
·
环境监测
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产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Renping Cao,Shaomin Song,Jingheng Nie,Xiaochun Li,Bang Lan,Liaolin Zhang,Fangrui Cheng,Jing Wang
With the development of plant growth lighting, more and more attention has been paid to red and far red luminescent materials. In this work, we synthesize successfully a non-rare earth and non-toxic Ca 2 AlNbO 6 :Fe 3+ phosphor in air and investigate the crystal structure, morphology, and luminescence properties of Ca 2 AlNbO 6 :Fe 3+ by using powder X-Ray Diffraction, the field emission scanning electron microscopy, and the Edinburgh steady-state FS5 spectrometer, respectively. The far-red emission with peak at 714 nm of Ca 2 AlNbO 6 :Fe 3+ is due to the 4 T 1 ( 4 G) → 6 A 1 ( 6 S) transition of Fe 3+ ion. Photoluminescence excitation (PLE) spectrum of Ca 2 AlNbO 6 :Fe 3+ includes four PLE peaks, which are assigned to the O 2− → Fe 3+ charge transfer band (CTB) (309 nm), the 6 A 1 ( 6 S) → 4 T 1 ( 4 P) (364 nm), 6 A 1 ( 6 S) → 4 E( 4 D) (395 nm), and 6 A 1 ( 6 S) → 4 T 2 ( 4 G) (532 nm) transitions of Fe 3+ , respectively. We further study the concentration/temperature dependent emission spectra and time-resolved emission spectra. The optimal Fe 3+ doping concentration (0.6mol%) and the only luminous center (Fe 3+ ) in Ca 2 AlNbO 6 :Fe 3+ are confirmed. The decay curves of Ca 2 AlNbO 6 :xFe 3+ (0.2 mol% ≤ x ≤ 1.2 mol%) are measured and their lifetimes decrease from 463.24 to 385.29 μs The emission spectra under different temperatures prove that Ca 2 AlNbO 6 :Fe 3+ has a good heat stability. We explain the luminous mechanism and concentration/thermal quenching mechanisms, and further research the application prospect of Ca 2 AlNbO 6 :Fe 3+ in plant growth lighting.
研究领域:
材料科学
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植物学
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光学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Chunqing Li,Li Xiao,Qinyu Zhang,Xinjian Cheng
It is urgent and important to detect heavy metals in environments. In this work, novel reaction-based fluorescent probes were obtained by Schiff base reaction. The probes with Schiff base moiety (-C=N-) undergo irreversible hydrolysis in the presence of Hg 2+ and Fe 3+ . They exhibit perfect high selectivity and sensitivity to Hg 2+ and Fe 3+ ions. Upon the addition of Hg 2+ and Fe 3+ , fluorescence intensity of the probes increased notably. And the color of the probe changes from brown to bright green under UV light, which can realize “naked eye” detection. In addition, Schiff base group was introduced into polyurethane chain through condensation polymerization reaction . As expected, the fluorescent polyurethane probe (P2) maintained the detection performance of its original small molecules (BSD). Even more P2 showed a more sensitive detection effect than BSD, and the detection limits of P2 for Hg 2+ and Fe 3+ reach 0.19 μM and 0.21 μM, respectively. It indicates that Reaction-based probes could be a useful tool for the detection of Hg 2+ and Fe 3+ .
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
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IF 2.931
Chunqing Li,Qi Sun,Qiang Zhao,Xinjian Cheng
It’s of vital importance to detect heavy metals in environment and living cells. In this work, four near-infrared regions boron dipyrromethene (BODIPY) probes (QBPH, PBPH, QBP and PBP) are constructed based on two BODIPY precursors (QB, PB) for sensing of Fe 3+ . As expected, these four probes exhibit obvious colorimetric and ratiometric response to Fe 3+ . In addition, QBP and PBP display highly sensitive and selective performance for detection of Fe 3+ . More importantly, QBP and PBP are successfully applied to near infrared imaging and detection of Fe 3+ in living A549 cells; it indicates that these novel designed probes could be a useful tool for the studies of Fe 3+ in living cells.
研究领域:
生物化学
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分析化学
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细胞生物学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
·
IF 4.3
Siying Che,Xiutan Peng,Anbang Shen,Linlin Yin,Yuanbin She,Haiyan Fu
Excessive or insufficient iron(Ⅲ) will pose burdens of human body, and its content is the key to control the function of iron-fortified food. In this regard, a functionalized quinoline ionic probe, benefiting from the electrostatic attraction, was designed for the colorimetric detection of Fe 3+ in food. This probe formed a 2: 1 complex with Fe 3+ , altering the UV–vis spectra and solution color. The UV–vis detection limit was 0.2 μM, and visually, the color shifted from light-yellow to dark-green as Fe 3+ concentrations increased, with a visual detection limit of 3.4 μM, meeting the maximum acceptable level of 5.4 μM. Noteworthy, ionic liquid-based sensing paper was constructed for rapid, semi-quantitative Fe 3+ detection. Furthermore, the satisfying recovery (97.4–102.9 %) was obtained in real samples, showcasing the probe’s efficiency. This work demonstrated the potential of ionic liquids for the fast, sensitive, and visual detection of Fe 3+ , offering a promising direction for metal element sensing platforms.
研究领域:
分析化学
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食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Jiulong Zhao,Chunhua Zhou,Chenyao Wu,Huan Wu,Chunping Zhu,Changqing Ye,Shige Wang,Duowu Zou
Alginate-Ca2+ hydrogel has been used to immobilize photothermal materials as well as chemotherapy drugs at lesion sites to prevent their entry into the bloodstream. However, the alginate-Ca2+ gelation mechanism may result in hardening of the blood vessels because of Ca2+ migration to the lesion site. In this study, a unique and facile one-pot formation of chemotherapeutic (doxorubicin, DOX) and polypyrrole-containing alginate hydrogel was designed by introducing Fe3+, which can synchronously induce the polymerization of pyrrole and gelatinization of alginate, into the DOX/pyrrole/alginate solution. The formed composite hydrogel was endowed with superior photothermal conversion properties in both the NIR-I (650–950 nm) and NIR-II (1000–1700 nm) biowindows and light-to-heat conversion efficiency higher than 50%, which enabled effective tumor hyperthermia treatment. Besides, near-infrared (NIR) irradiation could be used as a remote controller to trigger the DOX-release because of the heat generation, thus achieving continuous and on-demand tumor chemotherapy. The composite polymer hydrogels exhibited favorable hemo-, cyto-, and histocompatibility, as well as simple and cost-effective preparation and good clinical prospects.
研究领域:
生物医学工程
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Zeming Huang,Yin Gao,Zhengyu Huang,Donglin Chen,Jiahui Sun,Li Zhou
Exploring an effective sensor to detect Fe 3+ and phytic acid (PA) is of great importance because the levels of Fe 3+ and PA have a vital impact on human health. Herein, we report a metal-free fluorescent nanoprobe for sensitive and selective sensing of Fe 3+ and PA based on the sulfur quantum dots (SQDs). The SQDs with high fluorescence quantum yield (17.6%) and low cytotoxicity can be directly synthesized from cheap elemental sulfur by one-pot reaction. The SQDs display responsive and selective fluorescence “on–off-on” behavior towards Fe 3+ and PA based on the introduction and elimination of electron transfer effect. The addition of Fe 3+ can cause non-radiative electron transfer associated with fluorescence quenching of SQDs, while the addition of PA enables SQDs/Fe 3+ complex release Fe 3+ to recover the fluorescence of SQD S . By utilizing these SQDs as a fluorescent nanoprobe, it shows good linear relationship for Fe 3+ and PA in the range of 0.05–120 µM and 0–12 µM, respectively. Moreover, its limit of detection (LOD) for Fe 3+ and PA can reach as low as 102 and 73.5 nM, respectively, which compares favorably to many reported fluorescent probes. Additionally, the use of this SQDs-based sensor to detect PA in fresh carrot and lettuce samples was examined with satisfactory performance.
研究领域:
生物化学
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分析化学
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纳米医学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Yiran Che,Jingying Yang,Zhenming Dong,Jianhua Wang,Xiaoqing Yan,Yu Wang,Shaomin Shuang
A novel Schiff-base fluorescent probe, 4-(N-(2- hydroxyl-1-naphthalymethylimino)-ethylamino) −7-nitro-1,2,3-benzoxadiazole (HENB) was synthesized and utilized for spectral sensing of Fe 3+ ions at neutral pH. The binding of Fe 3+ to HENB in C 2 H 5 OH-HEPES buffer (1:1 v/ v, 25 mM, pH 7.2) resulted in a pronounced emission enhancement at 530 nm, which is possibly due to the inhibition of photo-induced electron transfer (PET) process as well as the chelation enhanced fluorescence (CHEF) effect. HENB shows good selectivity and sensitivity toward Fe 3+ with the detection limit as low as 4.51 nM. Test strips made of HENB was used for rapid “naked-eye” detection of Fe 3+ ions in aqueous medium. Moreover, HENB was successfully applied in fluorescence imaging of exogenous and endogenous Fe 3+ in live Hela cells as well as zebrafish. Importantly, HENB is capable of effectively monitoring the variations of Fe 3+ in living cells during ferroptosis process.
研究领域:
分析化学
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生物医学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 33
·17387-17392
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IF 3.708
Wengfeng Zhu,Jian Zhang,Zhenchao Jiang,Weiwei Wang,Xiaoheng Liu
In this paper, bright and high-quality carbon dots (CDs) were prepared by refluxing a membranous carbonized β-cyclodextrin in nitric acid. The structure and optical properties of the CDs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), fluorescence spectrophotometry (FL), X-ray diffraction (XRD) and Raman spectroscopy. The mechanism for the formation of the CDs is also discussed. As-prepared CDs could be used as peroxidase mimics for the detection of H2O2. The results indicate that the CDs are capable of rapid and sensitive detection of H2O2 in the linear range from 2 × 10−6 to 5 × 10−4 mol L−1 and the limit of detection of H2O2 is as low as 1 × 10−6 mol L−1. More importantly, the peroxidase-like activity of the CDs is expanded to the detection of some oxidative ions (such as Fe3+ and Ag+). The linear ranges for Fe3+ and Ag+ were 8 × 10−6 to 1 × 10−4 mol L−1 and 5 × 10−6 to 1 × 10−4 mol L−1 respectively, with corresponding detection limits of 8 × 10−7 mol L−1 and 5 × 10−7 mol L−1 respectively.
研究领域:
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
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2024
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IF 1
Lei Yang,Tangxuan Xu,Chenghao Li,Yuezhu Yang,Jing Huang
The zinc(II) bis-(8-hydroxyquinoline) (Znq2) has excellent photoluminescence properties, and its fluorescence emission can be significantly quenched by Fe3+ in water. To accelerate the detection response of Znq2 to Fe3+, a luminescent metal–organic framework Znq2@ZIF-8 based on guest molecular luminescence was constructed by growing zeolite imidazolate framework-8 (ZIF-8) on the outer surface of Znq2. The results show that the prepared Znq2@ZIF-8 has an octahedral core–shell structure, a particle size of approximately 1–3 μm, an enhanced specific surface area of 1105.41 m2 g−1, and with a stable green luminescence at 495 nm. A fluorescence analytical method was developed for the detection of Fe3+ in water, the correlation coefficients were significant in the Fe3+ concentration range of 0–600 μmol L−1, and the limit of detection was as low as 3.89 μmol L−1. The spiked recoveries of tap water samples demonstrated that the method could be applied to practical applications. The mechanism of fluorescence detection is that Fe3+ participates in the competitive coordination of Znq2@ZIF-8 metal centers, leading to the collapse of the crystal structure, meanwhile, Fe3+ produces a certain degree of competitive absorption of the excitation light of Znq2@ZIF-8. This method was applied for the detection of Fe3+ in water with good selectivity, anti-interference ability, and has the potential to be used as a rapid detection method.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Fangchao Cui,Rongsen Fan,Dangfeng Wang,Likun Ren,Qianqian Wang,Yuqiong Meng,Rui Ma,Shulin Wang,Zhiteng Liu,Xuepeng Li,Tingting Li,Jianrong Li
Food spoilage caused by bacteria led to about 600 million people suffering from foodborne diseases in 2020, and the diseases kill approximately 400,000 people annually. Traditional food preservatives, antibiotics, and nanomaterials have problems such as high dosage, bacterial resistance, and low biocompatibility. In this study, mild antibacterial carbon dots (TM-CDs) with Fe 3+ nutritional competitiveness were prepared. TM-CDs specifically chelated Fe 3+ and formed Fe-O. The maximum chelating capacity of TM-CDs for Fe 3+ was 154.56 mg mL −1 . TM-CDs exhibited a much stronger chelating ability for Fe 3+ than traditional iron chelators and even siderophores secreted by Pseudomonas fragi . The minimum inhibitory concentration of TM-CDs against Pseudomonas fragi was 0.25 mg mL −1 . The antibacterial mechanism of TM-CDs was the existence of Fe 3+ competition between TM-CDs and siderophores secreted by Pseudomonas fragi , which ultimately led to the death of Pseudomonas fragi due to iron deficiency. Notably, no obvious cytotoxicity of TM CDs was observed. In addition, the experimental results of freshness showed that TM-CDs effectively prolonged the shelf-life of salmon by 3–4 d. Therefore, this study provides insight into developing a competitive approach to depriving bacteria of nutrients for antibacterial purposes, with potential applications in seafood storage and preservation.
研究领域:
食品安全
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微生物学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 9
·6869-6878
·
IF 3.708
Li Wenfeng,Ma Hengchang,Lu con,Ma Yuan,Qi Chunxuan,Zhang Zhonwei,Yang Zengming,Cao Haiying,Lei ziqiang
A novel triphenylamine-based fluorescent sensor tris((4-amino)phenylduryl)amine (m-TAPA) for Fe3+/Cu2+ ion has been developed. m-TAPA shows high selectivity and sensitivity toward Fe3+/Cu2+ over alkali and transition metal ions in aqueous solution. The possible mechanism of fluorescence quenching was that Fe3+/Cu2+ can be captured by the NH2 groups of m-TAPA to form non-fluorescent complexes, resulting in strong quenching. The detection limits of Fe3+ and Cu2+ were calculated to be 230 nM and 620 nM, respectively. Furthermore, fluorescent test strips have been prepared for convenient detection of Fe3+ and Cu2+ ions in environmental water samples, even in drinking water.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）